GB528451A - Improvements relating to electrical apparatus for the measurement of mechanical pressures or movements or derivatives thereof - Google Patents

Improvements relating to electrical apparatus for the measurement of mechanical pressures or movements or derivatives thereof

Info

Publication number
GB528451A
GB528451A GB1225939A GB1225939A GB528451A GB 528451 A GB528451 A GB 528451A GB 1225939 A GB1225939 A GB 1225939A GB 1225939 A GB1225939 A GB 1225939A GB 528451 A GB528451 A GB 528451A
Authority
GB
United Kingdom
Prior art keywords
condenser
diaphragm
sleeve
face
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1225939A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EDWIN MATHIESON DODDS
THOMAS DENIS HUMPHREYS
AC Cossor Ltd
Original Assignee
EDWIN MATHIESON DODDS
THOMAS DENIS HUMPHREYS
AC Cossor Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EDWIN MATHIESON DODDS, THOMAS DENIS HUMPHREYS, AC Cossor Ltd filed Critical EDWIN MATHIESON DODDS
Priority to GB1225939A priority Critical patent/GB528451A/en
Publication of GB528451A publication Critical patent/GB528451A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/26—Details or accessories
    • G01L23/32—Apparatus specially adapted for recording pressure changes measured by indicators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/08—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically
    • G01L23/12—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically by changing capacitance or inductance
    • G01L23/125—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid operated electrically by changing capacitance or inductance by changing capacitance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/26—Details or accessories
    • G01L23/28—Cooling means

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

528,451. Measuring fluid pressure. COSSOR, Ltd., A. C., HUMPHREYS, T. D., and DODDS, E. M. April 24, 1939. No. 12259. [Class 40 (i)] [Also in Group XXXVI] An element suitable for measuring fluid pressures comprises a diaphragm arranged for one of its faces to be exposed to the pressure to be measured, while temperature-maintaining liquid is passed in contact with substantially the whole of the other face. The condenser element shown in Fig. 1 comprises a diaphragm la integral with a steel body 1 which has a screw thread 1b for insertion into an engine cylinder &c. A member 2 is formed with a web 2a and is riveted to the centre of the diaphragm 1a. Adjacent and parallel to the plane top face of the member 2 is the plane bottom face of a member 6 which is carried by a synthetic resin insulator 7 supported by a threaded steel sleeve 9. This sleeve is screwed into a second sleeve 3 which is screwed into the body 1 and grips the edge of the web 2a against a seating. The members 2, 6 form the moving and fixed plates of a condenser, the member 2 being constrained by the diaphragms 1a, 2a to move so that its upper face is always perpendicular to the direction of movement. Electrical connection to the member 6 is made with screened aero ignition cable secured in the sleeve 9 and making contact with the point 6a of the member 6. The diaphragms 1a, 2a form the top and bottom walls of a chamber through which cooling water, or other liquid such as oil, is passed by way of ducts 5 and pipes 4. In a modification, Fig. 2, the diaphragm 1a forms the moving plate of the condenser, there being two fixed plates 11, 12 formed as D-shaped heads on rods 11a, 12a. The cooling liquid serves also as the dielectric of the condenser. Water from the mains may be employed if the condenser is connected in a circuit supplied by alternating current of a frequency higher than the highest frequency of pressure variations to be measured. The pressure measurement is obtained by measuring the resulting modulation of the alternating current in frequency, phase or amplitude. In the construction shown in Fig. 1 ducts may be provided to enable the cooling liquid to pass between the plates 2, 6. In the construction shown in Fig. 2, the moving plate 'may be formed by a member similar to the member 2, Fig. 1, without the integral diaphragm 2a.
GB1225939A 1939-04-24 1939-04-24 Improvements relating to electrical apparatus for the measurement of mechanical pressures or movements or derivatives thereof Expired GB528451A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1225939A GB528451A (en) 1939-04-24 1939-04-24 Improvements relating to electrical apparatus for the measurement of mechanical pressures or movements or derivatives thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1225939A GB528451A (en) 1939-04-24 1939-04-24 Improvements relating to electrical apparatus for the measurement of mechanical pressures or movements or derivatives thereof

Publications (1)

Publication Number Publication Date
GB528451A true GB528451A (en) 1940-10-30

Family

ID=10001273

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1225939A Expired GB528451A (en) 1939-04-24 1939-04-24 Improvements relating to electrical apparatus for the measurement of mechanical pressures or movements or derivatives thereof

Country Status (1)

Country Link
GB (1) GB528451A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2153538A (en) * 1984-01-24 1985-08-21 Roy Edward Carter Pressure transducer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2153538A (en) * 1984-01-24 1985-08-21 Roy Edward Carter Pressure transducer

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